Starting in the late 1970s and. continuing for decades, an increasing amount of the. protective layer of stratospheric ozone above Antarctica. would disappear during late September and October, cre-. ating what is popularly known as the ozone hole.
A battalion is a military unit. The use of the term battalion varies by nationality and branch of service. Typically a battalion consists of 300 to 800 soldiers and is divided into a number of companies. A battalion is typically commanded by a lieutenant colonel. In some countries the word battalion is associated with the infantry. The term was first used in Italian as battaglione no later than the 16th century.
Four to six companies make up a battalion, which is normally commanded by a lieutenant colonel with a command sergeant major as principal NCO assistant. A battalion is capable of independent operations of limited duration and scope. An armored or air cavalry unit of equivalent size is called a squadron.BRIGADE â 3,000 to 5,000 soldiers. A brigade headquarters commands the tactical operations of two to five organic or attached combat battalions.wo to five divisions constitute a corps, which is typically commanded by a lieutenant general. As the deployable level of command required to synchronize and sustain combat operations, the corps provides the framework for multi-national operations. ARMY â 50,000+ soldiers.